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You were right guys, the technician I asked to build a prototype of this circuit soldered the positive electrode of the 47 uF cap to the gate of the FET, between resistors, instead of connecting it to VB. Doh! I haven't checked that out assuming he did it right. Now everything seems to be fine...
Hi, I designed a simple half bridge circuit using popular FET driver IR2101 (switching freq. around 500 Hz, drain current about 250 mA, supply voltage about 12 V):
Of course I have resistive load connected between the VS node and ground, just forgot to draw it.
This is a part of a bigger...
Hi, I have a problem with proper main clock configuration in STM32F030K6T6.
I've connected an external crystal 16 MHz with 2x15 pF caps, but the HSE is not starting.
Variable HSEStatus remains 0, so the PLL config doesn't execute.
And yes, I've set the HSE_VALUE to ((uint32_t)16000000 in header...
I solved my problem thanks to your suggestions.
Of course it was an assembly problem. I soldered the D7 Schottky the wrong way, ie. it was forward biased, thus shorting output to the ground and damaging the UC3843. I replaced the IC, soldered D7 correctly and it started to generate about 210 V...
I've already replaced the UC3843 using the new one, the results were the same. I also replaced the current sense resistors to 3 parallel 3.3 Ohm resistors and double-checked the reverse biased Schottky diode on the OUT pin. Nothing's changed, the circuit doesn't switch the output. Every part on...
I started programming STM32 from Keil, pretty good IDE. Didn't like the IAR, used it too for a while.
Tutorials? Start from blinking leds and chip's user manual on ST website. IMHO it's the best way to learn. Keil has also templates and startup files for ST microcontrollers.
About 15 mA @ 200 V DC. I tested this circuit in LTSpice with a 20 mA current source as a load and it worked well, no problems at all.
However, I haven't tested my real circuit on PCB with any resistive load.
Hi, I'm a newbie here, but decided to write my first post on edaboard, cause I encountered a problem I can't handle. I designed a switching PS to drive some Nixie tubes. Here's the schematic I've tested in LTSpice and it worked like charm:
I made a PCB, soldered all the parts and obviously...
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